Expansion-bolt.



No. 729,124.' Y "PATENTED MAY 26,- 1903. W. C. BOONE.

EXPANSION BOLT. APPLICATION FILE-D PEB. 27, 1 903.

N0 MODEL.

imm 2 UNITE STATES Patented May 26, 1903.

WILLIAM c. BOONE, OF NEW YORK, N, Y.

EXPANSION-BOLT.Y

SPECIFICATION formingpart of Letters Patent No. 729,124, dated May 26, 1903.

Application filed February 27, 1903. Serial No. 145,344. (No model.)

To {LZZ zoll/0771, it muy concern:

Be it known that I, WILLIAM C. BOONE, a citizen ofthe United States, and a resident of New York city, borough of Richmond, State of New York, have invented certain new and useful Improvements in Expansion-Bolts, of which the following is a specification.

My invention has relation to improvements in expansion-bolts of the class shown in Letters Patent No. 719,426, issued to me February 3, 1903, and has for its object to improve the construction of such bolts to the end that the same may be simpler in construction and produced at less cost; and to such and other ends my invention contemplates the novel details of improvement that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part hereof, wherein- Figure 1 is a side View of an expansionbolt embodying my invention. Fig. 2 is a central section thereof. Fig.' 3 is a similar view, the nut and collar being removed. Figs. 4 and 5 are detail views of the nut and collar shown in Fig. 2. Figs. 6 and 7 are respectively views at right angles to Figs. 4 and 5. Fig. 8 is a perspective View, enlarged, of the collar shown in said views. Fig. 9 is a sectional view of the expansion-bolt, showing the nut without the hub 6C. Fig. 10 is a perspective View of said nut, and Fig. 1l is a sectional View of a single expansion-bolt having a nut similar to that shown in Fig. 10.

Similar numerals of reference indicate corresponding parts in the several views.

In the drawings the numerals l 2 indicate the covers or expansion members of the eX- pansiOn-bolt, which are curved Or of concaveconvex form and of substantially tube form when placed together to meet centrally, as at 3, and at their ends said covers are provided, respectively, with in wardly-proj ecting shoulders or lugs l 2a. The edges of the covers are beveled or tapered outwardly at lb 2", at one or both ends, to points coinciding with the curved ends of the covers at which the shoulders 1a 2fL are located. Spring or elastic bands 5 surround the covers to normally hold them together. When the covers are held together outwardly, tapered Openings or jaws are provided between the edges l" 2,

within which the expansion-nut 6 and collar 7 are adapted to it, the collar being used with the double expansion-bolt and omitted in a single expansion-bolt, as in Fig. ll. The nut 6, provided with internal screw-threads, receives the threads on a bolt, screw, or the like 8, and is provided on opposite sides with wedge-shaped projections or wings 6 adapted to fit between the tapering edges 1b 2b of the covers 1 2 to actin spreading said covers apart when the nut is moved inwardly, the part 6b of the nut 6, the end adjacent the large ends of the projections dfL and between said projections, is in the form of shoulders adapted to fit within the covers 1 2, to lie against the projections or shoulders 1* 2a, to keep the nut from sliding backwardly out from between the covers. The nut shown in Figs. 1, 2, 4, and 6 is provided with a hub 6, extending outwardly beyond the part 6b, and

thus beyond the normal position of the hub with respect to the covers. (See Figs. 1 and 2.) In Figs. 9 and 1l the nut is not provided with the hub 6, but has the shoulders 6b, as in Fig. 10, and the nut lies wholly within the covers, and the bolt 8 serves to draw the nut within the covers.

The collar 7 is provided with a bore 7 for the free passage of the bolt or screw 8, and said collar is Wedge-shaped or tapered inwardly on opposite sides of its bore at 7b, the beveled or tapering edges being adapted to lie between the tapering edges 11 2*.of the covers l 2, to spread said covers apart when pushed-inwardly, and said collar-.is provided with a shoulder or annular rim 7, adjacent to the outer edges of the beveled portions 7",

' which shoulder is adapted to slide within the covers, and over which shoulder the projections 1a 2a are adapted to fit, as shown in` Fig. 2, to keep the collar from sliding away from the covers. It will be seen in Fig. 8 that the collar so constructed has two inwardly-tapering jaws 7d, providing a bore between them through which the bolt 8' passes. The collar 7 is provided with a hub 7f, projecting outwardly beyond the shoulder or annular rim 7C, but of less diameter than said shoulder or rim, adapted to have the part to be clamped pressed'against its outer end, whereby when the bolt or screw 8 is set up pressure will be brought to bear upon said hub to push the IOO beveled or tapered faces 7b of the collar between the tapering edges of the cover and expand the latter.

In Figs. l and 2 the double expansion-bolt shown is provided with a nut 6, having the hub 6, and a collar 7, having the hub 7f, whereby when the pressure is brought to bear on either or both of said hubs the covers 1 2 will be expanded by the inward sliding of the nut or collar, or both, so that a temporary expansion can be eected until the final expansion takes place through the medium of the bolt 8.

In Fig. 9 the nut 6, not having the hub 6c, is shown, and in such case when the expansion-bolt is placed in a hole the collar 7 can be pushed inwardly by the hub 7f to make a temporary expansion, and thus when the bolt is screwed up the nut 6 and collar '7 will to` gether expand the covers.

In the single expansion-bolt shown in Fig. l1 the nut 6 is maintained within the covers by the parts 6b of the nut and la 2 of the covers, and when the bolt or screw 8 is set up the nut will be drawn inwardly to expand the covers.

Having now described my invention, what I claim isl. An expansionbolt comprising covers lhaving inwardly-projecting shoulders at the ends, and provided with inclined edges projecting toward the ends, a nut provided with wedge-shaped projections or wings on opposite sides and having shoulders at the end adjacent the large ends of saidl projections to engage the shoulders on the covers, and a bolt to coact with said nut, substantially as described.

2. An expansion -bolt comprising covers having inwardly-projecting shoulders at the ends, and provided with inclined edges projecting toward the ends, a nut provided with wedge-shaped projections or wings on opposite sides and having shoulders at the end adjacent the large'ends of said projections to engage the shoulders on the covers and a bolt to coact with said nut, said nut having a hub extending outwardly beyond its projections, substantially as described.

3. An expansion-bolt comprising covers having inwardly-projecting shoulders at the ends, and provided with inclined edges projecting toward the ends, a nut provided with wedge-shaped projections or wings on opposite sides and having shoulders at the end adjacent the large ends of said projections to engage the shoulders on the covers, a bolt to coact with said nut, and a collar having wedge -shaped sides and provided with a shoulder or rim adjacent to the tapering edges thereof to engage the shoulders on the covers, substantially as described.

4. An expansion-bolt comprising covers having inwardly-projecting shoulders at the ends, and provided with inclined edges projecting toward the ends, a nut provided with wedge-shaped projections or wings on opposite sides and having shoulders at the end adjacent the large ends of said projections to engage the shoulders on the covers, a bolt to coact with said nut, and a collar having wedge-shaped sides and provided with a shoulder or rim adjacent to the tapering edges thereof to engage the shoulders on the covers said collar having a hub extending outwardly from said shoulder, substantially as dei scribed.

5. An expansion-bolt comprising covers having inwardly-projecting shoulders at the ends and provided with inclined edges projecting toward thc ends, a nut provided with wedge-shaped projections or Wings on opposite sides and having shoulders at the end adjacent the large ends of said projections to engage the shoulders on the covers, a bolt to coact with said nut, and a collar having a pair of wedge-shaped portions on opposite sides of its bore, a shoulder or annular rim adjacent to the outer edges of the beveled or inclined faces at the sides of the wedge-shaped portions, and ahub extending outwardly from said shoulder or annular rim, substantially as described.

6. A nut for an expansion-bolt comprising a body having wedge-shaped projections or wings on opposite sides and shoulders at the 'end of the body between the large ends of said projections or Wings, substantially as described.

7. Acollar for an expansion-bolt comprising a body having a bore and tapering jaws on opposite sides of the bore at one end, a shoulder or rim at the end opposite the jaws, substantially as described.

8. Acollar for an expansion-bolt comprising a body having a bore and tapering jaws on opposite sides of the bore at one end, a shoulder or rim at the end opposite the jaws, and a hub projecting from the end opposite the jaws, substantially as described.

WILLIAM C. BOONE.

Witnesses:

FRANK FoGGlN, ELISHA J. FIELD.

IOO 

